/Engine/Source/Runtime/MovieScene/Public/MovieSceneNameableTrack.h
Validate the new display name.
True if the given display name is valid, false if it is not. Error message should be set if the name is not valid.
virtual bool ValidateDisplayName ( const [FText](API\Runtime\Core\Internationalization\FText) & NewDisplayName, [FText](API\Runtime\Core\Internationalization\FText) & OutErrorMessage ) const